Cleaning Pond Filter Media: Mud vs. Pond Gold

Cleaning Pond Filter Media: Mud vs. Pond Gold

Reshaped pond, new liner. Filter box bottom coils very muddy. Asked: empty and wash, or leave for bacteria? Pond 1 year old.

Identify the Gunk

• Mud: Inorganic silt — rinse off.
• Pond gold: Thick black slop (decomposing waste) — remove it.

Why Remove Pond Gold

• Not where nitrogen cycle happens (that's on clean media).
• Decomposing waste pollutes water.
• Bacteria colonize better on clean media.

Cleaning Method

1. If Springflo/coils: squirt off slop with hose.
2. City water? Rinse in pond water (kiddie pool) to preserve bacteria.
3. Well water? Hose rinse fine.
4. Don't overclean — some biofilm remains.

Result

Removing slop opens fresh colonization sites. Good bacteria rebound fast. Cleaner filter = better flow = better biofiltration.